The SAFARI Detector System
MILLIMETER, SUBMILLIMETER, AND FAR-INFRARED DETECTORS AND INSTRUMENTATION FOR ASTRONOMY IX(2018)
摘要
We give an overview of the baseline detector system for SAFARI, the prime focal-plane instrument on board the proposed space infrared observatory, SPICA. SAFARI's detectors are based on superconducting Transition Edge Sensors (TES) to provide the extreme sensitivity (dark NEP≤2×10^-19 W/√(H)z) needed to take advantage of SPICA's cold (<8 K) telescope. In order to read out the total of 3500 detectors we use frequency domain multiplexing (FDM) with baseband feedback. In each multiplexing channel, a two-stage SQUID preamplifier reads out 160 detectors. We describe the detector system and discuss some of the considerations that informed its design.
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关键词
SAFARI, SPICA Transition Edge Sensor, Far-Infrared Spectrometer, Infrared Space Observatory, Frequency Domain Multiplexing, Far-Infrared Bolometer Array, Focal-Plane Array
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